Double-drum hoist



J. DITSON. DOUBLE DRUM HOIST. APPLICATION FILED JULY 20. um.

Patented May 23', 1922..

3 SHEETSSHEET I.

cfifi INVENTOR wa m'ww 4J2; ATTORNEY J. DITSON. DOUBLE DRUM HOIST. APPLICATION FILED JULYZO, 1921.

um N WE @W Mm M 8 m1 mm J. DITSON. DOUBLE DRUM HOIST. APPLICATION FILED JULYZO, 192i.

Patented. May 23, 1922.

3 SHEETS-SHEET 3.

A ATT NEY inafter appear JESSE DITSON, OF LITTLETON, GDLORADO, ASSIGNOR- T ING-ERSOLL-RAND COMEANY,

01E JERSEY CITY, JERSEY, A CORPORATION 015 NEW JERSEY.

DOUBLEDRUM HOIST.

inoan Specification of Letters Patent. I Pattoginltnadl May 23, 1922., I

Application filed July 20, 1921. Serial No. 456,098.

To all whom it may concern:

Be it known that l, Jnssn DITSON, a citizen of the United States, and a resident of Littleton, Arapahoe County, Colorado, have invented a certain Double-Drum Hoist, of

. which the following is a specification accompanied by drawings.

This invention relates to hoists, but more articularly to a self-contained double drum hoist driven by a single motor which may be a fluid pressure reversible 'motor. hoist of thistype is suitable for use in many kinds of work, in mines, factories, ship yards and other places, for hauling, lifting, and other purposes.

Such a hoist may be mounted on a column, cross bar or other support in various positions, and is ordinarily subjected to hard and rough usage, may be given little attention and frequently exposed to the elements, so that it. should berugged and furthermore so constructed that complicated parts which are liable to break or get out of order are avoided.

The objects of this invention are to construct a hoist of the double drum type having a strong and firmly braced frame, including a motor at one end and a gear box at the other, the parts of which can be readily assembled and disassembled, permit convenient and easyaccessibility to the driving. connections, reduce the number of parts, cheapen the cost of manufacture and produce a hoist which is rugged and will withstand the rough usage to which it may be subjected. 3

Further objects of the invention will hereand to all of thes e ends the invention consists of. the features of construction, arrangements of binations' of elements substantially as fully describedand claimed in this specification and shown in one of its preferred forms in the accompanying drawings in which.

Figure 1. is a horizontal view of the hoist; I I

Figure 2 is a longitudinalseetlonal elevation on the line 2-2 of Figure 1 through the centerof the hoist'looking in the direc-v tion of the arrows; I

Figure-3 isa transverse sect onal view through the gear box of Figure I looking in the direction ofthe arrows;

tained hoist.

parts and com-y sectional plan Figure 4 is an end elevation of the motor end of the hoist partly broken away and partly 1n transverse section, and

Figure 5 is a detail sectional elevation of i the motor valve showing the valve in a different position from that indicated in Figure 4.

Referring to the drawings, the base plate A of the hoist is provided with the clamping member B and the saddle clamp C having the clamping bolts D for clamping the hoist to a column, cross bar or other support. A supporting frame E is mounted in upright position at one end of the base plate as by means of the bolts F, and another supporting frame in the form of a gear box G is likewise mounted in upright position at the opposite end of the base plate A as by means of the bolts H. A removable cover plate J is secured to the gear box G as by means of the bolts K in order to permit ready accessibility to the driving connections of the hoistwhich are preferably shown in the form of gearing.

A central driving shaft L 1s mounted in the roller bearing 0 in the frame E and in the bearing sleeve P in the gear box J, and is preferably covered and rotected by the sleeve Q. The driving sha t L is connected to be driven by a motor dismountably connected to'the frame E and as shown the crank disk R having the crank pin S is connected by means of the roller bearing T to the piston U of a fluid pressure motor of the Dake or so called square piston 'type, as a motor of this type has been found to be particularly adaptable for a self-con- The frame E of the hoist formsrthe inner or back head of the motor cylinder casing V which is in the form of a flat rectangular frame open at front and back; In a motor of the Dake type the piston' U has an up and down motion in the piston frame W which 'reciprocates back and forth in the cylinder casing V on the gib X adjustable by means of the screws Y.

The front cylinder head Z is removably secured to the cylinder casing V as by means of the bolts a which also hold the front head Z and cylinder casing V to the frame E.

Motive fluid is supplied to the motor at' the inlet b and exhausted at the outlet 0 and the distribution of motive fluid is controlled by a suitable manually operated reversing Valve d slidable in the valve chest e formed in the cylinder head Z. The valve (Z is provided with the heads f, g and k controlling ports and passages in the valve chest e leading to the motor. A rack 7' on the valve engages a pinion is .to which a valve lever is connected by means of which the valve is manipulated. Springs ;0 between the ends of the valve and the plugs 19 oppose movement of the valve in either direction.

Without describing the construction of the motor more fully since the details of the motor form no part of the present invention,- and the motor is of a well known type, it will be suflicientto state that with the valve d in the position shown in Figure 4, motive fluid from the inlet 6 passes to the passage r in the valve chest 6 and thence to the motor while the exhaust from the motor passes through the port 8 in the valve chest and out through the exhaust port if as indicated by the arrows in Figure 4. When the position of the valve is reversed in order to reverse the motor as indicated in Figure 5, the motive fluid from the inlet 6 enters the valve chest at the passage 7' and passes to the motor through the port .9 while the ex haust from the motor enters the valve chest at the port a and exhausts through the port t. A suitable oiling device 1)- is connected to the valve-chest for carrying oil into: the motor, and an oiling device it on the supporting frame E supplies oil to the driving shaft bearing.

The advantage of constructing the cylinder casing V of the motor as shown and described resides in' the fact that the internal parts of the cylinder casing may be more readily machined and the frameE, cylinder casing V, and cylinder head Z may be readily assembled and disassembled.

"Drum bearings 00 which also serve to space the frame E'and gearbox Gr at a given distance apart, and brace the motor frame, are supported between the frames at each side of the driving shaft L. The drum bearings may be formed with shoulders y engagin the boxes 2 in the frame E and gear box respectively and bolts 2 passing through the drum bearings 00 serve to hold the parts together and securely brace the hoist frame.

Drums 3 and 4 are mounted to rotate upon the -drum bearings w and, a rope. or cable 5 may have; one end 6 connected to t-he drum 3 by meansof the screw] and theother end 8 connectedtothedrum 4 by the screw 9 or other suitable devices the cable being wound on thedrums in opposite directions, so that one drum is a haulage drum and v the other a tail rope .drunijboth ,rotatingin ,the samedirection. Meansare'pijovided for connecttions of the drums depend upon the direction of rotation of the driving shaft to which rotation is imparted by the motor and also depend upon the adjustment of the controlling device for connecting one drum or the other to the driving shaft.

The driving shaft L is provided with the driving pinion 1O keyed thereto and intermediate gears 11 and 12 which do not engage the driving pinion, are mounted on the shafts 13 and 14 of the intermediate pinions 15 and 16 which mesh with the internal gears 17 and 18 of the drums 3 and 4 respectively. The intermediate pinion shafts 13 and 14 rotate in the ball bearings 19 and 20 in the gear box G and in the ball bearings 21 and 22 in the gear box cover plate J. A shift-able pinion 23 suit-ably mounted to rock about the center of the driving shaft L is provided for throwing either one of the intermediate gears 11 or 12 into driving connection with the driving pinion 10 and for this purpose a rocking frame 24 is pivoted at one side of the driving pinion 10 on the driving shaft bearing P and at the other side of the pinion 10 upon the bearing sleeve 25. The shaft 26 of the shiftable pinion 23 is carried in the rocking frame 24. A hand lever 27 is suitably clamped to an extension 28 on the rocking frame 24 by means of the bolt. 29, and a spring latch 30 operated by a handle grip 31 pivoted at 32 to the handle cooperates with the teeth 33 on the segment 34 for locking the rocking frame 24 in any desired position. An oil cup 35 closes the end of the tubular extension 28 on the rocking frame 24 and a suitable oiling device 36 may be provided on the gear box G.

The drums are preferably provided with brakes 37 and 38 on the drum flanges 39 and 40. The brakes are preferably both atthe same ends of the drums so that brake levers 41 and 42 may conveniently be arranged side by side at the same end of the machine below one of the drums in position to be grasped by the operator. A brake rod "13 extending transversely across the machine beneath the drums is suitably mounted on the base plate A in the lugs 44 and the ends 45 of the brake 38 are connected to the brake nuts 46 and 47 traveling on the reversely screw threaded portions 48 and 49 of the brake rod. Similarly the ends 50 of the brake 37 are connected to the nuts 51 and 52 traveling on the .reversely screw threaded portions :53 and 54 of a sleeve 55 rotatable on the brake rod 43. I The brake lever 41 for the drum 3 is connected to the sleeve 55 while thebrake lever 42 for the drum 4 is connected tothe brakerod 43. The brakes are 1 tightened or loosened in an obvious manner by rotating the levers and the brake rod 43 andbrakesleeve In the operationof the hoist let it be assumed that the motor is imparting rotation to the driving shaft L in a given direction as for instance clockwise, as Figure 3 is pinion 23 has been moved into engagement with the intermediate gear 11 which is connected to drive the drum 3 by means of the intermediate pinion 15 and internal gear 17.

The drum 3 becomes the haulage or lifting drum and is driven in the same direction as the driving shaft L. The tail rope drum is an idle drum in such case, permitting the rope or cable to unwind but will be rotated in-the same direction as the drum 3. The conditionsare merely reversed and both drums continue to rotate in the same direction as the driving shaft L when the change gear pinion 23 is shifted from the intermediate gear 11 into engagement with the intermediate gear 12. The direction of rotation of the drums is reversed by reversing the motor and imparting rotation to the driving shaft L in a reverse direction.

I claim:

,1. A double dgrum hoist, comprising a base plate, a supporting frame mounted in upright position at one end of the base plate, a gear box mounted in upright position at the opposite end of the base plate, a removable cover plate for said gear box, a central driving shaft having bearings in said frame and gear box, a reversible fluid pres-.

suremotor secured at the outside of said supportlng frame and operatively connected to a drive said driving shaft in either direction,

drum bearings supported by the said frame and gear box at each side of the central driving shaft and maintaining the outer portions of the frame and gear box in spaced relation, bolts passing through the drum bearings for holding the parts together, drums rotatably mounted on said drum bearings, and driving connections mounted in the gear box between the driving shaft and drums including shiftable means for connecting the driving shaft to one or the other of the drums.

2. A double drum hoist, comprising a base plate, a supporting frame mounted in upright position at one end ef the base plate, a gear box mounted in upright position-at the opposite end of the base plate, a central driving shaft having bearings in said supporting frame and gear box, a removable cover plate for said gear box, a reversible fluid pressure motor secured over the end of the driving shaft against the outside of said supporting frame, said motor being operatively connected to drive said driving shaft.

' ings, driving connections mounted in said gear box for the driving shaft and for each of the drums, and shiftable means for connecting either one or the other of said drums to be driven by the driving shaft.

3. A double drum hoist, comprising a base plate, a supporting frame mounted in upright position at one end of the base plate,

drum bearings for holding the .parts together, drums rotatably mounted on said drum bearings, a driving pinion on the driving shaft, intermediate gears mounted in the gear box and connected to drive the drums respectively, an intermediate pinion mounted in the gear box meshing wlth the driving pinion and shiftable into and out of mesh with one or the other of the said intermediate gears, and a hand operated lever outside of the gear box connected to shift said intermediate pinion to drive one or the other of said drums.

45A double drum hoist, comprising a base plate, a supporting frame mounted in upright position at one end of the baseplate, a gear box mounted in upright position at the opposite end of the base plate, a remov able cover plate for. said gear box, a central driving'shaft having bearings in said frame and gear box, a reversible fluid pressure motor secured at the outside of said supporting frame said motor being operative-1y c0nnected to drivesaid driving shaft in either direction, drum bearings supported by the said frame and gear box at each side of the central driving shaft in maintaining the outer portions of the frame and gear box in spaced relation, bolts passing through the drum bearings for holding the parts together, drums rotatably mounted on said drum bearings, driving connections mounted in the gearbox between the driving shaft and drums including shiftable means for connecting the driving shaft to one or the, other of the drums, a brake for each of said drums, hand operated brake levels for said brakes located side by side at one end of the hoist below one of the drums, and operative connections between said brake levers and the brakes respectively.

5. A double drum hoist, comprising a base plate, a supporting'frame mounted in upright position at one end of the base plate, a

gear box mounted in upright position atthe opposite end of the base plate, a central driving shaft having bearings in said supporting p the frame and frame and gear box, a removable cover plate for said gear box, a reversible fluid pressure motor secured overthe end of the driving shaft against the outside of said supporting frame, an outer head secured to the motor cylinder said motor being operatively connected to drive said driving shaft in either direction, tubular drum bearings supported in the supporting frame and gear box at each side of the driving shaft, through bolts pass ing through said drum bearings for holding gear box together, drums rotatably mounted on said drum bearings, driving connections mounted in said gear box for the driving shaft "and for each of the drums, shiftable means for connecting either one or the other of said drums to be driven by the driving shaft, a brake for each of said drums, hand operated brake levers for said brakes located side by side at one end of the hoist below one of the drums, and operative connections between said brake levers and the brakes respectively.

6. A double drum hoist, comprising a base plate, a supporting frame mounted in upright position at one end of the base plate, a gear box mounted in upright position at the opposite end of the base' plate, a removable cover plate for said gear box, a reversible fluid pressure motor removably supported at the outside of the said supporting frame, a central driving shaft having bearings in said frame and gear box said motor being operatively connected to drive said driving shaft in either direction, spacing sleeves forming drum bearings supported in the frame and gear box at each side of the driving shaft, bolts passing through said drum bearings for holding the parts together, drums rotatably mounted on said drum bearings, a driving pinion on the driving shaft, intermediate gears mounted in the gear box and connected to drive the drums respectively, an intermediate pinion mounted in the gear box meshing with the driving pinion and shiftable into and out of mesh with one or the other of the said intermediate gears, a hand operated lever outside of the gear box connected to shift said intermediate pinion to drive one or the other of said drums, a brake for each of said drums, hand operated levers for said brakes located side by side at one end of the hoist below one of the drums, and operative connections between said brake levers and the brakes respectively.

In testimony whereof I have signed this specification.

JESSE DITSON. 

